Which to use
“fiar” and “firmar” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #19,114
- “fiar” frequency rank
- #4,008
- “firmar” frequency rank
- 23122
- confusion score
Side-by-Side Comparison
| Feature | fiar | firmar |
|---|---|---|
| Definition | Asegurar el cumplimiento de una promesa, responsabilidad o deuda. | Poner la firma en un escrito. |
Where the eye mixes fiar and firmar
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. fiar runs 4 letters (CVVC) against firmar's 6 (CVCCVC) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: fiar vs firmar
A purely visual mix-up. fiar ([ˈfjaɾ]) and firmar ([fiɾˈmaɾ]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 letter(s) in length. Our composite confusion score for this pair is 23122, derived from the frequency rank of both members and their visual similarity.
fiar is recorded at frequency rank #19,114, classified as averb, pronounced [ˈfjaɾ]. firmar is at rank #4,008, tagged as averb, pronounced [fiɾˈmaɾ].
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 23122, this pair ranks #247,288 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fiar vs firmar
Shared letters: afir. Private to "fiar": -. Private to "firmar": m.
"fiar" · 4 letters · shape CVVC · "firmar" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fiar" for "firmar" ever safe?
In ordinary Spanish text, does "fiar" or "firmar" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "fiar" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "firmar" - compare definitions side by side with the headword page. Word entry
- This pair ranks #247,288 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "fiar" and "firmar" also get mixed up with nearby pairs, the highest-scored neighbour is "fiar vs fijará". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #247,288 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.